Well, I find a $35 increase weird, yeah. Unless they're spreading the expected cost of all the meets, including regionals and nationals (more expensive due to less gymnasts attending). Then I suppose a $35 per gymnast per meet increase might be realistic, I don't know. How many gymnasts would be attending the meet?
Then again some booster clubs have quite an expensive "assessment" or "team" fee in the hundreds per season. That generally doesn't encompass just meets though, but probably breaks down to a fair amount per meet. However when I went to a gym who did this, they all paid all the regionals and nationals fees (meet + apparel) for optionals (plus airfare if applicable). Maybe even states, I can't remember. All optionals at this gym made it to regionals, pretty much a given by the standards of the program - so I suppose you could subtract that amount of money.